Wave-detector.



J'. L. GREVELING.

WAVE DETECTOR.

APPLIoATIoN FILED MAY 24, 1907.

.Patented oet. s', 1911.

fl/ l l, @Kfw shown in the accompanying drawing has for UNITED sTATEs PATENT oEEIoE.

JOHN L. CREVELING, OF NEI/V YORK, N. Y.

WAVE-DETECTOR.

Specication of Letters Patent.

Patented oet. 3, 1911.

Application filed May 24, 1907. Serial No. 375,534.

oscillations or a device useful for any otherpurpose requiring quick and accurate adjustment of on'e or more small or delicate electrodes.

The particular form of ymy invention its particular object to produce an improved form of electrolytic wave detector covered broadly in United States Letters Patent No.Y

761,450, granted to me May 31, 1904, comprehending a plurality of electrodes an intervening electrolyte and means for adjusting their mutual relations.'Y

In the drawing: Figure 1 indicates a vertical section of one type of'my improved detector. Fig. 2 is a plan View of the same in partial section through the line a-b. Fig. 3 is a section of one form of multiple electrode which may be used in my invention; and Fig. 4 is a modification of one portion, shown in section in Fig. 1, as will hereinafter more fully appear.A 1

.In the various ligures like numerals refer to corresponding parts.

In the' drawing, (1) indicates the base of the detector made preferably of any suitable insulating material. Upon this .is mounted a small vise or clamp (2), the jaws of which may be opened or closed as by the adjusting screw The member' (2) serves to support or carry the small receptacle (4), which contains any suitable solution or an electrolyte indicated at (5), which is in electrical communication with the member (2), through the receptacle (4), Aprovided the same be made of conducting material, or if (4) be made of non-conducting material a conducting member may be led from the electrolyte to the member (2) establishing electrical communication therewith. The member (2) is provided with a 'binding screw (6), by which yconnection with the member (2) can be established in' a suitable circuit.

(7) is a glass cylinder resting in a'n annular recess in the base (l) and serves to surround the above described members of the instrument and protect the same from act-ion of wind or dust, and from mechanical injury. The member (7) carries or supports the annular member (8) of suitable msulating material, which is firmly held down `upon the glass cylinder (7) as by means 'of rods (9) having expanded thumb screw portions upon the top, as indicated in Fig. 2,

Yand a threaded portion at the` bottoml engaging the threads in nuts or bosses (10) of conducting material properly fastened to the base plate (l). One of these posts may be in electrical communication with the binding post (11) as indicated in Fig. 1.

(12) represents a metallic member which is firmly fastened into the member (8) and carried thereby.. This member is rovided with an annular recess or cavity (P3) into which is vplaced a compression spring (14). The member (12) is provided with a central aperture, through which passes the stem (15), provided at its lower portionwith the annular shoulder or flange (16), which is pressed downwardly by the compression spring (14). The stem (15)' has a certain vertical movement but is kept from revolving by the pin or'key (17) engaging the slot or key-way (18). rIhe threaded portion of the stem (15) engages the nut (26) which is provided with a hand-wheel (27), revolution of which in one direction would cause the member (15) to be raised against the action of the spring (14) and in the other direction will allow the spring .(14) to lower the member (15). The member (1 5) is provided with a central bore into which may be inserted the ltube y(19), passing through the cap (20), which is'attached to the stem (15) andy carries the thumb screw (21) adapted to pressagainst or release the tube (19).

(22) is a nut having a taper thread en-` gaging the end of the tube (19) and which is threaded and longitudinally slotted as indicated in Fig. 1- in a manner which will hereinafter more plainly appear.

(23) is -a rod or .wire which is inserted within the bore of tube (19) and may 'be firmly held in anyposition within the .tube by screwing up the nut or by pressing against the side of tube (19), as by screw (21), so as to compress the slotted end of the tube (19) against the rod (28), One

'end of the rod (23) is provided with asmall extension (24) tovwhich is attached the small or delicate electrode (25). y'

v (28) is a recess or basin cutin the base 5 member (1) to catch any of the electrolyte which might be spilled out of the receptacle (4) or dropped in the operation of filling the same. f f

(29) (see F ig. 4) is a small glass receptacle, which may be fitted into the depression (28) as a further means of catching any of the electrolyte which might be spilled. In Fig. 3, (30) represents the tube or protecting sleeve, similar to (19), provided with an expanded portionA (31)r and adjustin screw (32), serving to grip the tube (33% which is inserted within the tube (30) as shown. is provided with an expanded portion (34) and adjusting screw (35) adapted to hold or release the 'rod (36) as desired. The tube (33) carries the small electrode (37) while the rod (36) is pro l vided with a small electrode (3S) when the detector is assembled as shown in Figs. 1 and 2, the expanded portion of one of the rods .(9) establishes electrical communication between the electrode (25) f and the binding post (11), by causing electrical connection between the members (12) and (10). In this Way. thebinding post (11) serves to connect electrode (25) into any suitable circuit. The member (12) may be cut away as indicated at (39) in Fig. 2, and thus keep one of the rods (9) from electrical communi cation with the member (12) and other parts electrically connected therewith.-

The operation of the detector Aas 'above described is substantially as follows :The electrode' (4),-electrolyte (5) and electrode (25) are placed in series'in any suitable circuit as may be readily seen by connect? ing said circuit into binding posts (6) and (11) `and with the parts in the position shown delicate adjustment can be given to the electrode` (25) by revolution of the hand-'wheel (27), while coarse adjustment of the electrode (25) cany be instantly 'effectedby relieving the pressure against the member (23) ,f as by unscrewing (21) and moving the member (23) within the tube (19) by hand. lf desirable .to remove the electrode (25), it may, be drawn quite within the tube (19) by properly sliding the member (23) within the tube (19), in which l position the delicate electrode (25) will be entirelyI surrounded and protected by the tube (1.9)- Then the tube (19), together with themembers ('23), (24) and (25) can v'readily be -withdrawn from the bore of stem (15).

'Extra electrodes andmembers (23) and tubes (19) may be kept with' the tube in such position as to entirely protect the electrodev (25) and readily inserted within theL bore o the stem (15') without any'danger ner,l worn out electrodes can be rapidly taken out and new ones placed in their stead of in anyway injuring the delicate electrode (25). When the tube (19) has been properly inserted Within the Amember (25), then (23) may be pressed down rapidly as desired, until electrode (25 shall Contact with the electrolyte (5), which will cause a signal to the operator if the instrument be inan ordinary detecting circuit; where` upon thev screw (21) can befset up to hold the electrode in a fixed position relative to the member (15), and then delicate, careful. adjustment, giving any desired depth of immersion, can be -quickly made'by operationl of the'hand-wheel (27). In this man' Without any danger of damage,- even in the dark, or the whole operation can' be done with one hand while the operator is-using the other forhsending.

In cases Where it is desirable to change from a line electrode to a coarser one, the same may be accomplished quite rapidly by substituting another in the manner above set forth; or in instruments `where this change is often desirable the modification, as shown in Fig. 3, may. .be very useful. Vith this arrangement both the electrodes (37) and (38) may be protected from any mechanical injury, by drawing them within the sleeve (30), andfthe sleeve or tube (30) can then be inserted in the bore of the member (15) of the detector, as was described in reference to the 4sleeve or tube (19). Then by proper and evident manipulation,

' either the electrode (37) or 'maybe brought into Contact` and properly. 1mmersed in the electrolyte (5) in a manner evident from the above description. Further, rapid changes from one electrode to fthe' other can be made in a manner quite apparent.

I' do ,not in any way limit myself to'this specific or detail construction of the appal ratus as 'above described and'shown in the 110 drawing, the same being merely a particular form of device atpresent used by me in carrying out and employing my invention. Considerable variation can, of course, be

made without departing from the spirit or scope of my invention,l which is as set forth in the following-claims. y,

I claim- 1. A i detector of electric disturbances comprehending a plurality of conducting members, .an 4interposed electrolyte and means for adjusting said membersto vary the circuit therethrough comprising a movable member, means for, delicately adjusting the same, a .protecting member carried i thereby, means for supporting one of said conducting members carried by said protecting member whereby the 'conducting member may be-drawn within said protect ing member.

Copies o1 this patent may be obtained for 2. A deteotor'for electric waves or Ioscillations comprehending a receptacle of con'l ducting material, a conducting medium 1n saidv receptacle, a conducting member immersed in said medium and removable means carrying said last named member, provided with'means movable thereon for protecting said4 member.

.3. A detector of electric waves or disturbances comprehending a plurality of electrodes, andv an interposed electrolyte combined with a member carryin one of said electrodes, a sleeve surrounding said member, means for holding said member in a fixed position in relation to said sleeve and means supporting said carrying inember and sleeve capable of adjusting the relation between the electrode and the electrolyte. 'i v 4. A detector of electric waves' or disturbances4 comprising an electrolyte, a plurality of velectrodes in. operative relation thereto combined with means for supporting one of said electrodes comprising an electrode holder, a sleeve surrounding said holder and means for holding said sleeve and holder' in adjustable relation to the electrolyte.

5. A detector of electric Waves or impulses comprising an electrode, an electrode holder, a movable sleeve surrounding the same, means for retaining the sleeve in fixed positions upon the holder, an electrolyte and means for supporting the electrode in adjustable relation to the electrolyte in such manner that 1t may be immersed therein.v

asl

6. A detector of electric waves or iin-' pulses 'comprising an electrode, an electrode holder, a movable sleeve surrounding the same, means for retaining the sleeve infixed position upon the holder, an electrolyte and means for supporting the 'electrode in adjustable relation to the electrolyte in such.

manner that it may be immersed therein, and means for varying its depth of imlme'rsion.

7. A detector of electric Waves or im` pulses comprehending an electrode, an electrolyte and means for varying the immersion of the electrode inthe electrolyte comprising a frictionally held coarse adjustmeans coperlcombined with means whereby one of said electrodes may be made operative and the other inoperative without removal from the detector. l i

v JOHN L. CREVELING. Witnesses:

EUGENE Doon,- 1 T. J. DoRLAN.

five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

